I am a true believer of the Valentine One. I have it my current E39 and will quickly install it on my new M5 when I get it. It has saved my buttucks on numerous times on Californina Freeways. It's range and direction finder is amazing and the software is upgradable as new technolgies appear. The one time a CHP pulled me over by using the old fashioned way, by simply pacing me with his radar off, my scruffy terrier licked the officers hand as he asked for my docs. Since he was a dog lover, I got off with a warning.